46 Guide to Crustacea. 



Table-case species are exceedingly common all round our coasts. They are 

 °" almost terrestrial in their habits, burrowing in the sand above 



high-water mark, and sometimes at a little distance from the sea. 

 The two are often found together, and it is perhaps incorrect to 

 imply that they are distinguished in popular speech, but Talitrus 

 is stated to be more common on sandy beaches, while Orchcstia 

 is often found among rocks. 



More typical representatives of the Gammaridea, however, are 



Fig. 28. 



Acgina spinosissima, one of the Caprellidae, slightly reduced. 

 [Table-case No. 7.] 



the numerous species of Gammarus, of which some live in the sea 

 and others, like the very common Gammarus pulex of this country, 

 in fresh water. Specimens and a drawing of Gammarus locusta 

 (Fig. 27) are shown in this case and a coloured drawing of the 

 same species, from life, is hung in Wall-case No. 6. 



Of the other Gammaridea exhibited, it need only be said that 

 some, like Eurythenes gryllus and Stegocephahis avipulla, show 

 the large size reached by some species in Arctic Seas, where they 

 swarm in extraordinary profusion; that Acantliogammarus god- 

 lewskii is one of a host of remarkable species, all closely related 



